On the other hand, WebStorm provides the following key features: Some of the features offered by IntelliJ IDEA are: IntelliJ IDEA and WebStorm belong to "Integrated Development Environment" category of the tech stack. WebStorm is a lightweight and intelligent IDE for front-end development and server-side JavaScript. Out of the box, IntelliJ IDEA provides a comprehensive feature set including tools and integrations with the most important modern technologies and frameworks for enterprise and web development with Java, Scala, Groovy and other languages WebStorm: The smartest JavaScript IDE. IntelliJ IDEA: Capable and Ergonomic IDE for JVM.